Category Archive
The following is a list of all entries from the AddIn category.
.Net AddIn Framework: Concurrency problem
Using .Net System.AddIn framework in an environment that needs to handle concurrency may be a bad idea.
The problem is that the communication between Host adapter and AddIn adater, using remoting, can handle only 2 concurent conections.
This is because the implemented remoting communication is opening only 2 channels as shown in the picture below.
If more than 2 concurrent requests arrives to the Host adapter, the folowing exception is raised:
“RemotingException: Port is busy (…) All pipe instances are busy.”
A proposed approach to solve this issue would be to create an AddIn pool as shown below.
.Net AddIn Framework structure
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Component |
Description |
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The Application that will use the AddIn. |
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Component that runs on the application’s ApplicationDomain. It is the gateway between the application and the addIn. |
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Component that runs on the addIn’s ApplicationDomain. It is the entry point of the addIn. |
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The AddIn that is executed. The call to it is made by the AddIn Adapter. |
For mor information on the AddIn Framework: